ask them
Farsports made handlebars that won at the olympics, i doubt they work with fakes.
Leon is the OEM for Elite wheels, i also doubt they work with fakes.
Peter is a good guy, i dont think he deals in fakes.
That said, i've never paid up to get DT swiss hubs, so i really dont know how prevalent fakes are. What i do know is that most OEMs are using hubs either unbranded (their in house hubs), or the likes of Novatec & Bitex that, for all intended purposes, are replicating DT swiss without calling it DT swiss. Which is why i've never paid extra to get an actual dt swiss hub.